﻿/*
 * Copyright (c) 2011
 * Thomas Rozanski, Geoffrey Wright, Zachary Lynn, Jesse Natalie
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the team nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THOMAS ROZANSKI, GEOFFREY WRIGHT,
 * ZACHARY LYNN, OR JESSE NATALIE BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;

namespace Kinected
{
    /// <summary>A basic Kinect camera.</summary>
    /// <seealso cref="RealCamera"/>
    /// <seealso cref="MockCamera"/>
    public abstract class Camera
    {
		private DateTime lastHadNewImages = DateTime.Now;

		public bool HasNewImage()
		{
			TimeSpan timeDifference = DateTime.Now - lastHadNewImages;

			if (timeDifference.TotalMilliseconds > 30) // camera is 30fps so 33.3ms
			{
				lastHadNewImages = DateTime.Now;
				return true;
			}

			return false;
		}

        public abstract bool Start();
		public abstract bool Stop();
		public abstract RGBAImage GetRGBAColorImage();
		public abstract RGBAImage GetRGBADepthImage();
		public abstract RAWImage GetRAWDepthImage();
    }
}
